\documentclass[landscape]{article}
\setlength{\pdfpagewidth}{11in} \setlength{\pdfpageheight}{8.5in}
\begin{document}
\begin{tabular}{lcccccccc}
\multicolumn{9}{c}{Effect} \\
\multicolumn{9}{c}{)} \\ \hline
 & (1) & (2) & (3) & (4) & (5) & (6) & (7) & (8) \\
VARIABLES & y1 & y1 & y1 & y1 & y1 & y1 & y1 & y1 \\ \hline
 &  &  &  &  &  &  &  &  \\
mortality & -1.4*** & -0.9 & -3.8* & -12.6** & -13.5** & -20.3** & -49.8* & -252.7** \\
 & [0.5] & [0.9] & [2.1] & [5.7] & [6.4] & [9.7] & [26.3] & [101.8] \\
 &  &  &  &  &  &  &  &  \\
Observations & 165 & 164 & 164 & 164 & 164 & 164 & 165 & 165 \\
 year & 1400 & 1500 & 1500 & 1500 & 1500 & 1500 & 1500 & 1500 \\ \hline
\end{tabular}
\end{document}
